docs: def is_isolated_list_abundance(graph: BELGraph, node: BaseEntity, cls: Type[ListAbundance] = ListAbundance) -> bool:
      """Return if the node is a list abundance but has no qualified edges."""
      return (
          isinstance(node, cls) and
          0 == graph.in_degree(node) and
          all(
              data[RELATION] == HAS_COMPONENT
              for _, __, data in graph.out_edges(node, data=True)
          )
      )